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fix: fail if the user is root #749

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Merged
merged 1 commit into from
Aug 1, 2022
Merged

fix: fail if the user is root #749

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32 changes: 25 additions & 7 deletions python/repositories.bzl
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Original file line number Diff line number Diff line change
Expand Up @@ -108,13 +108,26 @@ def _python_repository_impl(rctx):
rctx.file(distutils_path, rctx.attr.distutils_content)

# Make the Python installation read-only.
if "windows" not in rctx.os.name:
exec_result = rctx.execute(["chmod", "-R", "ugo-w", "lib"])
if exec_result.return_code:
fail_msg = "Failed to make interpreter installation read-only. 'chmod' error msg: {}".format(
exec_result.stderr,
)
fail(fail_msg)
if not rctx.attr.ignore_root_user_error:
if "windows" not in rctx.os.name:
exec_result = rctx.execute(["chmod", "-R", "ugo-w", "lib"])
if exec_result.return_code != 0:
fail_msg = "Failed to make interpreter installation read-only. 'chmod' error msg: {}".format(
exec_result.stderr,
)
fail(fail_msg)
exec_result = rctx.execute(["touch", "lib/.test"])
if exec_result.return_code == 0:
exec_result = rctx.execute(["id", "-u"])
if exec_result.return_code != 0:
fail("Could not determine current user ID. 'id -u' error msg: {}".format(
exec_result.stderr,
))
uid = int(exec_result.stdout.strip())
if uid == 0:
fail("The current user is root, please run as non-root when using the hermetic Python interpreter. See https://github.com/bazelbuild/rules_python/pull/713.")
else:
fail("The current user has CAP_DAC_OVERRIDE set, please drop this capability when using the hermetic Python interpreter. See https://github.com/bazelbuild/rules_python/pull/713.")
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Perhaps a comment with https://man7.org/linux/man-pages/man7/capabilities.7.html for developers would be helpful.


python_bin = "python.exe" if ("windows" in platform) else "bin/python3"

Expand Down Expand Up @@ -227,6 +240,11 @@ python_repository = repository_rule(
"Either distutils or distutils_content can be specified, but not both.",
mandatory = False,
),
"ignore_root_user_error": attr.bool(
default = False,
doc = "Whether the check for root should be ignored or not. This causes cache misses with .pyc files.",
mandatory = False,
),
"platform": attr.string(
doc = "The platform name for the Python interpreter tarball.",
mandatory = True,
Expand Down
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